Drilling-machine.



J. M. SHORT.

DRILLING MACHINE.

APPLICATION FILED 0Ec.2|.1911.

1&58352. Patented Mar. 12, 1918.

JESSE M. SHORT, 0F JOPLIN, MISSOURI.

DRILLING-MACHINE.

Specification of Letters Patent.

P atented Mar. 12, 1918.

Application filed December 21, 1917. Serial N 0. 208,306.

To all whom it may concern: v

Be it known that I, Jnssn M. SHORT, a citizen of the United States, residin at Joplin, in the county of Jasper and tate of Missouri, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

My invention relates to drilling machines, to drill wells, mines, particular reference to the provision of shock absorbing means, for connecting the flexible element of the apparatus, such as a rope, cable or the like, with the Walking beam. 7

An important object of the invention is to provide means of the above mentioned character, which are simple in construction, strong, durable, and reliable in operation.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of a machine embodying my invention,

Fig. 2 is an end elevation of the supplemental walking beam, and,

Fig. 3 is a detail section taken on line 33 of Fig. 2.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 5 designates a base,'upon which is secured a vertical support or upright 6. The numeral 7 designates amain walking beam, preferably formed'of a pair of spaced I-beams 8, having blocks 9 and 10 arranged between the same, at the ends thereof. These blocks are rigidlysecured to the I-beams by bolts 11. The block 9 is provided with an opening to receive a pivot element or shaft 12, carried by the support or upright 6.

Arranged to operate or slide between the I-beam's 8 of the walking beam 7, is a cross head 13, having pivotal connection with a pin 14, carried by a crank 15, rigidly secured to a shaft 16. This shaft is journaled through the upper end of a stationary support or upright 17 secured to the base 5. The shaft 16 receives its rotation from a pulley 18, vhich may be driven by any suitable means. It is obvious that when the pulley 18 is rotated, the walking beam 7 and the like, and has will be oscillated in a substantially vertical plane.

Arranged rearwardly of and near the sup port or upright 6 is a vertical support or upright 19, rigidly attached to the base 5 by any suitable means. Pivoted to the support 19 is a spool or drum 20, adapted to have a flexible element This flexible element may be a rope, cable or the like. The flexible element 21 passes about a grooved pulley 22, pivoted to the upper end of a beam'or mast 23. A drilling tool 24 is secured to the free end of the flexible element 21.

The numeral 25 designates a supplemental walkingbeam, arranged abovethe main walking beam 7 and extending longitudinally thereof. The supplemental walking beam is of approximately the same length the main walking beam, and preferably extends from the forward end of the main walking beam to a point near and spaced from the rear end of such main walking beam. The supplemental walking beam 25 has a knuckle 26, which is rigidly secured to its rear edge, at the rear end thereof, the supplemental walking beam preferably being in the form of an I-beam. The upper knuckle 26 has pivotal connection, at 27,

v with a lower knuckle or knuckles 28, ar-

ranged upon opposite sides of the upper I- beam 8, and rigidly secured thereto, by means of bolts or the like. The knuckle or knuckles 28 are arranged near and spaced from the rear end of the main walking beam 7, and positioned wholly upon the forward side of its pivot 12.

At its forward end, the supplemental walking beam 25 has a preferably flat transverse plate 29, arranged therebeneath and rigidly secured thereto by means of bolt 30 or the like. Arranged upon the upper edge of the upper beam 8, at the forward end thereof, is a preferably flat transverse plate 31, rigidly secured thereto by means of bolts 32 or the like. Disposed above the supplemental walking beam 25, and free from direct connection therewith, is a preferably flat transverse plate 33, as shown. The plates 29, 31 and 33 are provided near their ends with alined openings 34, for slidably receiving rods 35, provided at their lower end with heads 36, and having theirupper ends screw-threaded to receive adjusting nuts 37. Surrounding the rods 35, between 21 wound thereon.

the plates 29 and 31, are compressible coil springs 38, while compressible coil springs 39 surround these rods between the plates 29 and 33, Particular attention is called to the fact that the springs 39 are heavier or stilfer than the springs 38, while the nuts 3'? may be employed to regulate or alter the tension of these springs, the supplemental walking forward end, and rearwardly 38 and 39, are straps or bars 40, having pivotal connection with a sheave wheel or pulley 41, having the flexible element or cable 21 passed therebeneath.- I

The operation of the machine is as fol lows:

The rotation of the pulley 18, by means of the intermediate elements, causes the main walking beam '1 to oscillate in a substantially vertical plane. lhis oscillatory movement is imparted to the supplemental walking beam 25, through the medium of the yielding connection between the forward ends of these elements. It is thus apparent that the yielding connection will absorb the shocks transmitted to the flexible element 21, without lessening the force or blow of the tool or bit 24. The heavier springs 39 enable the supplemental walking beam 25 to quickly raise the tool or hit 24,, while the lighter springs 38 serve to catch the slack in the flexible element 21. By .this means it is found that the life of the cable 21 or the like is greatly prolonged, and often doubled, thereby elfecting a substantial saving in the cost of operating the machine.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus claim:

1. ln a machine of the character described, a main pivoted walking beam, a supplemenbeam 25, near its of thesprings described my invention, ll

Rigidly secured to.

naeaeea tal walking beam extending longitudinally of the main walking beam and having its rear end pivoted to themain walking beam near the rear end of such main walking beam, yielding means connecting the forward ends of the two walking beams, means to oscillate the main walking beam, and a wheel connected with the forward portion of the supplemental walking beam and adapted for engagement with a flexible element.

2. In a machine of the character described, a main pivoted walking beam, a supplemental walking beam extending longitudinally thereof and pivotally connected with the same, yielding means serving to connect corresponding ends of the main walking beam vand supplemental walking beam, means to oscillate the main walking beam, and a wheel carried by the supplemental walking beam and adapted for engagement with a flexible element.

3, In a machine of the character described, a main pivoted walking beam, a supplemental walking beam arranged above the same and extending longitudinally thereof, means to pivotally connect the corresponding end portions of the two walking beams, an element secured to the opposite end of the main walking beam, an element secured to the cor responding end of the supplemental walking beam, a rod connected with the first named element and having slidable engagement with the second named element and provided at its upper end with a stop, a spring surrounding the rod and disposed between the first and second named elements, and a spring surrounding the rod and disposed between the second named element and the stop, the second named spring being stiffer than the first named spring.

"in testimony whereof ll aflix my signature in the presence of two witnesses.

JESSE M. SHURT.

Witnesses Wniemr, CHAs. it WAnnnN, 

